The term fever describes a body temperature that is higher than normal. According to the Mayo Clinic, normal body temperature is typically 37 degrees C, or 98.6 degrees F, though this can vary. A short-term increase in body temperature can help th...

Bleeding can refer to blood loss inside the body (internal bleeding) or blood loss outside of the body (external bleeding). It can cause bruising, pain, and symptoms of shock. Too much bleeding can lead to death.

The color of vomited blood varies depending on the amount of time the blood has been in the gastrointestinal system. If there is a delay in vomiting, blood will appear dark red, brown or black and precipitated blood clots produce the appearance of coffee ground like material.

Chronic pain is pain lasting longer than three months. People are more likely to suffer from chronic pain if they are older, have a weakened immune system, have poor diet and exercise habits, or are smokers.

It is normal to have periods of low energy when one needs to rest and recuperate. However, if low energy persists and a person continually feels sluggish, disinterested in life, and has low energy, the situation should be investigated by a physician.

Diarrhea is a condition classified as the appearance of loose, watery stools and/or a frequent need to go to the bathroom. It generally lasts a few days and often disappears without any treatment. Diarrhea may be related to a viral or bacterial in...